10101121010221 has 4 divisors (see below), whose sum is σ = 10107031556700. Its totient is φ = 10095210463744.

The previous prime is 10101121010153. The next prime is 10101121010231. The reversal of 10101121010221 is 12201012110101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6417558224100 + 3683562786121 = 2533290^2 + 1919261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10101121010221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101121010231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2955270676 + ... + 2955274093.

It is an arithmetic number, because the mean of its divisors is an integer number (2526757889175).

Almost surely, 2^{10101121010221} is an apocalyptic number.

It is an amenable number.

10101121010221 is a deficient number, since it is larger than the sum of its proper divisors (5910546479).

10101121010221 is an equidigital number, since it uses as much as digits as its factorization.

10101121010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5910546478.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10101121010221 its reverse (12201012110101), we get a palindrome (22302133120322).

The spelling of 10101121010221 in words is "ten trillion, one hundred one billion, one hundred twenty-one million, ten thousand, two hundred twenty-one".